Resilient wheel.



F. P. PATZMAN. RBSILIENT WHEEL. APPIJIOATIQN FILED OUT. 17, 1911.

- 1 Patented" Dec. 30,1913;

2 SHEETS-SHEET 2 i w 3 \V I lli wlkaic ar I ,rrnn STATES PATENT ()FFC" FREDERICK I". manna, on nirsas cIrY, MISSOURI.

RESILIENT WH EL.

To all whom it may concern:

Be it known that I, FREDERICK F. PATZ- MAN, a citizen of the United States, residing at Kansas City, in the county of J ack- Missouri, have invented certain new, and useful Improvements in Resilient Wheels, of which the following is a specification.

This invention relates to resilient wheels,

and has for its object to produce a wheel of this character which will operate efficiently and reliably and embodies the'desirable features of simplicity, strength, durability and inexpensiveness of construction.

Tothis end the invention consists in certain novel and peculiar features of construction and organization as hereinafter described and claimed; and in order that it maybe fully understood reference is to be had to the accompanying drawings, in which Figure 1, is a fragmentary side view of a resilient wheel embodying myinvention, the wheel being partly broken away toeX- pose features otherwise hidden. Fig. 2, is an enlarged section on the line II-II of Fig. 1. Fig. 3, is a fragmentary side view of a modified form of construction. Fig. 4

' is an enlarged section onthe line IV-+IV of Fig. 3;.Fig. 5, is a perspective view of one of the cushions or buffers; Fig.f6,'i$ a perspective view of one of a set ofbrackets for supporting said cushions-or buffers and rods against lateral or, i i f in said openings 21' aroundsaid pins.

' For thepurpose of lubricating the pivoted pins 16,-the

for bracingpcertain twisting movement.

In the said drawings,'1-, is the inner.rnem 'ber of a wheel. and consists ,of a hubv 2,

spokes 3, felly 4, preferably of wood and a;

peripherally channeled metal rim 5, secured by U-bol-ts 6 and-nut sr', .to the felly,thebolts being braced and. thefelly strength-- ened by cross plates 8,-fthrough which the.

ends of the bolts 6 extend. =Sai'd'rimis composed of segments and is wider'than the folly and is formed in its inner side, posite sides of the telly with annular grooyes 9, for a purposewhich hereinafter appears.

10 is an internallyohannele'd rim forming part of the outer member of the wheel,-

and; externallyembraces rim -5 with a slidas. relation, and is provided;-in it's inner sides with annular-grooves 1lcontaining packings '12, engaging the outersides" of rim 5' to establish dust proofj'and lubricating joints therewith; securedperi'pherallv to the rim- 5 and forming a part of the oute r Specification of Letters Patent. Application filed October 17, 1911. Serial No. 655,199.

vided at their ends with circular ing from oil reservoirs .28,

.PatentedDec.30,-1913.

member of the wheel, is a compressible tread .13, of rubber or equivalent material, rings .14 secured-to said rim, holding said tread in place. sition so that it may be readily removed prel minary to securing the tread in or removing from position.

To prevent material independent rotative action between the inner member and the outer member of the wheel, I provide the following constructionz At suitable points a number of brackets 15 are secured to and within the rim 5 of the inner member of the wheel, only one of such brackets being illustrated, dially outward and are bifurcated in their outer ends and seoiired in said bifurcated ends are transversely arranged pins 16. 17 isa corresponding number of brackets within and secured in any suitable manner to the peripheral jecting radially inward thereof.

Said brackets are bifurcated attheir inner through and adapted for play in said openlngs are transversely arranged pins 19.v 20 are links arranged Within the rims and pro:

One of said rings is bolted in poand said brackets project ra ends and at opposite sides of the bifurcations ai providedx'vith openings 18, and extending openings portionof rim 10, and pror 21 materially larger than and receiving said 'pins: 16. and 190i adjacent brackets 15, and

l7, .-a'11d to, constitute antifriction pivoted cular series of; rollers 22 are arranged withconnections of links. 20 with latter are hollow and providedwith perfo-' rations-23 through which oil may pass and oneend of each pinvlfi'is open and projects 'to-oneside of its respective bracket 15 and said'pins are "connected by curved'tubes 24 to tubes- 25 carried by the adjacent brackets to radial passages 26 inthe said. brackets.

Communicatingwith said. passages are ratight joints by screw caps To lubricate connec'tionsbetween the pins and-links, cir-.

closed Witliliquid the pivoted connections of links 20 with pins I 19, the ends of saidflinks eneircling' said pins which communicatethe outer '19,' are provided with openings 30- with j ends of fle'xi- 'ble tubes 31 connected at their jinner ends -to ,oil' tubes 32 corresponding to tubes 27, i

and providedinward of the fel1y,1with reservoirs corresponding to those connected. to tubes 27. 1

To constitute air and dust proof connec .tions between the rims 5 and 10, rings 33 of leather or other flexible material, are secured at their inner margins in grooves 9 by means ofclamping rings.34, as shown, or in any other suitable manner, and at their outermargins said rings. 33 fit upon bolts 35 projecting outward from the sides-of rim 10, andsaid outer margins of the flexible rings are clamped tightly against T1111 10, by

- nuts 36, engaging the bolts.

To protect theflexible rings from abrasion or other injury and to form washers between the flexible rings 33 and nuts 36, metal shields 37 are'provided, the same extending inward beyond the innermost por-i tions of the flexible rings and terminating the distance between the folly and the pe-.

ripheral portion of the tread. v For holding the inner and'outer members centralized with respect to each other, un-- der normal conditions, brackets 40 are disposed within the inner rim 5 and secured in any suitable manner to the bridge portion thereof, and are provided with slots 41 through which links 20 extend, the slots'being narrow so as to guard against lateral movement of the links without interfering with .their free movement in the plane of the circumference of the wheel. The brackets are provided near their outer, ends with sockets 42, and ribs 43-extending diametrically of said sockets, which ribs form arched outer ends for the slots 41.

44 are resilient cushions or buflers of rubber by preference, which fit at their in ner ends in sockets 42 and are provided at such .ends with diametric grooves 45 receiving the arched ribs 43, and to secure said cushions reliably to said brackets bolts 46 are embedded in the cushions and extend through holes 47 in the ribs and are engaged at their inner ends by nuts 48. I

The" cushions 44 terminate short of the peripheral portion. of rim 10, and contact with the latter only in the event that the wheel runs over an unusual projection or depression of the roadway. -In such case the particular cushions 44 approximately underlyingthe axis of movement, will move downward and yieldingly limit the downward movement of the inner member by contact with'the outer member. The upwardlyprojecting cushions will check the rebound of; the inner member and cushion centralized in resilient relation by compressed air, the air being introduced through the medium of a valve mechanism'5'2, of the type shown or of any other suitable or preferred type. As no claim is made to the special type ofvalve mechanism the same is not described in detaiL,

Assuming that the rims are held apart by compressed air introduced through the valve mechanism, or by springs 49, it is obvious that when the machine of which the wheel forms a part, is loaded thev inner member of the wheel will settle until its axis is slightly below that of the outer member, and that during the progress of the machine, the inner member will move up ward and downward more or less, according to the irregularities in the roadway over which the wheel passes, as customary in this class of wheels. In the event i that compressed air is employed to hold the members in proper rel ation, air will pass packings 12 and be confined between the flexible rings and the rims. Such air will distend the flexible rings, which in this case must be elastic, as otherwise the air confined within the rims and rings 33, will have no power to hold the rims in concentric relation and cushion their vibratory movements.

In the constructionshown lay-Fig. 1, in which springs, 49 are employed to yieldingly hold the inner and outer members of the wheel in coiicentric'relation, the cushions 50 perform two functions, they hold the springs in their proper positions and cooperate with cushions 40 1n cushioning the members when under unusually severe jolting, there occurs sufficient vertical play to efiect contact between the outer member and the cushions '44 as hereinbefore explained.

In both cases, the members are compelled to rotate together through the link connections between brackets 15 and 17, provision being made through the pin and slot connection constituted by pins 31 andopenings 18,

for the accommodation of independent vibratory movement of the members in any d rection.

From the above description, it will be ap parent that I have produced a resilient wheel embodying the features of advantage enumerated as desirable, and I wish it to member provided with a peripherally channeled circular rim, an outer member consistmg of a compressible tread and an internally channeled circular. rim, flexible rings at 011-- posits-sides of the peripherally channeled -r1m and secured at their inner margins thereto, and at their outer' margins to the internally channeled rim, springs interposed between and bearing against said' rims, a series of brackets secured to the inner rim and a like number of brackets secured to the outer rim, and links, connecting the brackets of one of said rims with the brackets of the other rim and extending at approximately right angles to the radi ofthe wheel drawn therethrough; each link being loosely pivoted at one end and restricted at its other end to pivotal movement in a plane parallel with the face or side of the wheel.

2'. A ,resilient wheel, comprising an inner member provided with a peripherallychanneled circular rim, an outer member consisting of a compressible tread and an internally channeled circular rim, the last-named rim fitting around and snugly embracing the first-named rim with a sliding relation, flexible rings at opposite sides of the -,peripherally channeled rim and secured at their outer margins to the inner side of the internallychanneled rim and at their inner margins to the peripherally channeled rim,

aseries of springs arranged within and bearingat the r opposite ends against said rims and tending to-hold the same in concentric relation, brackets secured to the inner rim within the channel thereof, a similar number of brackets secured to and within the channel of the outer rim and links connected to the brackets of the inner rim and restricted to pivotal movement thereon, said links also having a pin and slot connection with the brackets of the outer rim.

3. In a resilient wheel, an inner member, an outer member surrounding the inner member, springs interposed between and bearin a ainst said members and tendin gt 5% to hol hem in concentric relation, brackets secured to the inner member, brackets secured to the outer member, links pivotally connecting ,the' first-named and last-named brackets in pairs, oil reservoirs secured to the inner member'of the wheel, pipes extendg outwardl from said reservoirs, and flexible tubes eading from the said pipes to the pivotal points of said links.

I 4:. A resilient Wheel comprising telescop-- mg inner and outer rims, said outer rim having a resilient tread surface, flexible rin I coverings for sealing the joints between said rims, 'a series of slotted blocks secured to the inner rim within the space between said inner and outer rims, each of said blocks carrying a resilient plug slightly spaced normally from the outer rim, and a series of link connections extending through the slots of said blocks and having lateral play therein, each of said links being pivoted to the inner rim and having a loose-play connection with the outer rini.

In testimony whereof I aifix my signature, in the presence of two witnesses.

' FREDERICK F. PATZMAN.

Witnesses:

HELEN O. RODGERS, G. Y. THoRrn.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

